package top.vains.server;
 
import java.io.Serializable;
import java.math.BigDecimal;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;

import lombok.Getter;
import lombok.Setter;
import oshi.SystemInfo;
import oshi.hardware.CentralProcessor;
import oshi.hardware.GlobalMemory;
import oshi.hardware.HardwareAbstractionLayer;
import oshi.hardware.CentralProcessor.TickType;
import oshi.software.os.FileSystem;
import oshi.software.os.OSFileStore;
import oshi.software.os.OperatingSystem;
import oshi.util.Util;

/**
 * 服务器信息
 * @author vains
 */
public class Server implements Serializable {
 
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
 
	private static final int OSHI_WAIT_SECOND = 1000;
 
	/**
	 * CPU相关信息
	 */
	@Getter
	@Setter
	private Cpu cpu = new Cpu();
 
	/**
	 * 內存相关信息
	 */
	@Getter
	@Setter
	private Mem mem = new Mem();
 
	/**
	 * JVM相关信息
	 */
	@Getter
	@Setter
	private Jvm jvm = new Jvm();
 
	/**
	 * 服务器相关信息
	 */
	@Getter
	@Setter
	private Sys sys = new Sys();
 
	/**
	 * 磁盘相关信息
	 */
	@Getter
	private List<SysFile> sysFiles = new LinkedList<>();
	
 
	 public void copyTo() {
	        SystemInfo si = new SystemInfo();
	        HardwareAbstractionLayer hal = si.getHardware();
 
	        setCpuInfo(hal.getProcessor());
 
	        setMemInfo(hal.getMemory());
 
	        setSysInfo();
 
	        setJvmInfo();
 
	        setSysFiles(si.getOperatingSystem());
	    }
 
	    /**
	     * 设置CPU信息
	     */
	    private void setCpuInfo(CentralProcessor processor) {
	        // CPU信息
	        long[] prevTicks = processor.getSystemCpuLoadTicks();
	        Util.sleep(OSHI_WAIT_SECOND);
	        long[] ticks = processor.getSystemCpuLoadTicks();
	        long nice = ticks[TickType.NICE.getIndex()] - prevTicks[TickType.NICE.getIndex()];
	        long irq = ticks[TickType.IRQ.getIndex()] - prevTicks[TickType.IRQ.getIndex()];
	        long softirq = ticks[TickType.SOFTIRQ.getIndex()] - prevTicks[TickType.SOFTIRQ.getIndex()];
	        long steal = ticks[TickType.STEAL.getIndex()] - prevTicks[TickType.STEAL.getIndex()];
	        long cSys = ticks[TickType.SYSTEM.getIndex()] - prevTicks[TickType.SYSTEM.getIndex()];
	        long user = ticks[TickType.USER.getIndex()] - prevTicks[TickType.USER.getIndex()];
	        long iowait = ticks[TickType.IOWAIT.getIndex()] - prevTicks[TickType.IOWAIT.getIndex()];
	        long idle = ticks[TickType.IDLE.getIndex()] - prevTicks[TickType.IDLE.getIndex()];
	        long totalCpu = user + nice + cSys + idle + iowait + irq + softirq + steal;
	        cpu.setCpuNum(processor.getLogicalProcessorCount());
	        cpu.setTotal(totalCpu);
	        cpu.setSys(cSys);
	        cpu.setUsed(user);
	        cpu.setWait(iowait);
	        cpu.setFree(idle);
	    }
 
	    /**
	     * 设置内存信息
	     */
	    private void setMemInfo(GlobalMemory memory) {
	        mem.setTotal(memory.getTotal());
	        mem.setUsed(memory.getTotal() - memory.getAvailable());
	        mem.setFree(memory.getAvailable());
	    }
 
	    /**
	     * 设置服务器信息
	     */
	    private void setSysInfo() {
			SystemInfo si = new SystemInfo();
			OperatingSystem os = si.getOperatingSystem();
			Properties props = System.getProperties();
	        sys.setComputerName(os.getNetworkParams().getHostName());
	        sys.setComputerIp(os.getNetworkParams().getIpv4DefaultGateway());
	        sys.setOsName(props.getProperty("os.name"));
	        sys.setOsArch(props.getProperty("os.arch"));
	        sys.setUserDir(props.getProperty("user.dir"));
	    }
 
	    /**
	     * 设置Java虚拟机
	     */
	    private void setJvmInfo() {
	        Properties props = System.getProperties();
	        jvm.setTotal(Runtime.getRuntime().totalMemory());
	        jvm.setMax(Runtime.getRuntime().maxMemory());
	        jvm.setFree(Runtime.getRuntime().freeMemory());
	        jvm.setVersion(props.getProperty("java.version"));
	        jvm.setHome(props.getProperty("java.home"));
	    }
 
	    /**
	     * 设置磁盘信息
	     */
	    private void setSysFiles(OperatingSystem os) {
	        FileSystem fileSystem = os.getFileSystem();
	        OSFileStore[] fsArray = fileSystem.getFileStores();
	        for (OSFileStore fs : fsArray) {
	            long free = fs.getUsableSpace();
	            long total = fs.getTotalSpace();
	            long used = total - free;
	            SysFile sysFile = new SysFile();
	            sysFile.setDirName(fs.getMount());
	            sysFile.setSysTypeName(fs.getType());
	            sysFile.setTypeName(fs.getName());
	            sysFile.setTotal(convertFileSize(total));
	            sysFile.setFree(convertFileSize(free));
	            sysFile.setUsed(convertFileSize(used));
				BigDecimal b = new BigDecimal(used / total * 100);
				double usage = b.setScale(4, BigDecimal.ROUND_HALF_UP).doubleValue();
				sysFile.setUsage(usage);
	            sysFiles.add(sysFile);
	        }
	    }
 
	    /**
	     * 字节转换
	     *
	     * @param size 字节大小
	     * @return 转换后值
	     */
		private String convertFileSize(long size) {
	        long kb = 1024;
	        long mb = kb * 1024;
	        long gb = mb * 1024;
	        if (size >= gb) {
	            return String.format("%.1f GB" , (float) size / gb);
	        } else if (size >= mb) {
	            float f = (float) size / mb;
	            return String.format(f > 100 ? "%.0f MB" : "%.1f MB" , f);
	        } else if (size >= kb) {
	            float f = (float) size / kb;
	            return String.format(f > 100 ? "%.0f KB" : "%.1f KB" , f);
	        } else {
	            return String.format("%d B" , size);
	        }
	    }
}